(* whenjobs * Copyright (C) 2012 Red Hat Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *) (** Handle the locking that ensures only one instance of the daemon can run per user. *) val create_lock : string -> unit (** [create_lock jobsdir] creates the lock file (called [daemon_pid]) in the [jobsdir] directory. The lock is automatically released when the process exits. *) val update_pid : unit -> unit (** Call this if the PID of the program changes, ie. after fork. *) val test_locked : string -> bool (** Test if there is a lock file and the lock is held by another process. *) val kill_daemon : string -> unit (** If there is a daemon holding the lock, kill it. *)